How to delete the first line of a text file?

Question

I have been searching online, but have not found any good solution.

Here is my text file:

[54, 95, 45, -97, -51, 84, 0, 32, -55, 14, 50, 54, 68, -3,          


        

Answer 1

Bash will be faster for that purpose. You can use these in you python script:

subprocess.Popen.communicate()

I wrote a function for running a subprocess cmd for shell:

def popen_method(call):
    subprocess_call = Popen([call], shell=True, stdout=PIPE, stderr=PIPE)
    out, err = subprocess_call.communicate()
    if err:
        raise yourError(
            '\n============= WARNING/ERROR ===============\n{}\n===========================================\n'.format(
                err.rstrip()))
    return out

You call it like this:

testing = "sed -i /var/output/ip_list.csv -e '1 s/^.*$/host_id,ip,last_updated/g'"
popen_method(testing)

or use:

from sh import sed

then run the sed command:

sed -i /var/output/ip_list.csv -e '1 s/^.*$/host_id,ip,last_updated/g'

This will replace whatever you had on the first line with host_id,ip,last_updated.